20H1M1F1BR (EP44, 20HMFB)
For the manufacture of turbine fasteners and flanged connections of steam lines and valves.
Fasteners turbines and steam pipes and flanges equipment with an operating temperature up to 580 degrees.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Heat resistant steels and alloys | Heat-resistant relaxation-resistant steel |
Chemical composition
| Standard | Fe, % | Si, % | B, % | Mn, % | Cr, % | Ti, % | Ni, % | V, % | Ce, % | P, % | C, % | S, % | Nb, % | Mo, % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GOST 20072-74 | 94.305–96.72 | < 0.37 | < 0.005 | 0.5–0.8 | 1–1.5 | < 0.06 | < 0.3 | 0.7–1 | 0.05–0.1 | < 0.03 | 0.18–0.25 | < 0.03 | 0.05–0.15 | 0.8–1.1 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\epsilon_L$$, % | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | Treatment |
|---|---|---|---|---|---|---|---|---|---|---|
| Rod | GOST 20072-74 | 780 | 665 | 14 | 50 | 590 | Hardening and tempering |
Brinell hardness number
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| Alloy | GOST 20072-74 | hot rolling | 229 |
Standards
| Standard | Description |
|---|---|
| GOST 20072-74 | |
| TU 14-1-522-72 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| B | % | Bor |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Ti | % | Titan |
| Ni | % | Nickel |
| V | % | Vanadium |
| Ce | % | Cerium |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
| Nb | % | Niobium |
| Mo | % | Molybdenum |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\sigma_{P}$$ | $$MPa$$ | Proportionality limit |
| $$\epsilon_L$$ | % | Elongation at break (longitudinal) |
| $$\psi$$ | % | Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ | $$\frac{J}{m^2}$$ | Impact toughness |